The power synchronization control strategy for grid-connected voltage-source converters (VSCs) provides an operation similar to synchronous machines. It is able to avoid the instability caused by a standard phase-locked loop in integration into weak grids. However, the non-minimum phase phenomenon in the developed dynamics places a fundamental limitation on the ac system's stability. This paper proposes a one-degree-of-freedom internal-model-based control methodology. It introduces a control approach to incorporate the dynamics of the system's nominal model in the control structure. It also rectifies the unwanted effects of the right-half plane zeros. The explicit incorporation of the model enhances the tracking capabilities of the controller in a PV-based VSC. Besides, this article shows that a single-loop of control will suffice to regulate active and reactive power. Validating results are generated via a hardware-in-the-loop system based on a Xilinx Zynq-7000 SoC field-programmable gate array (FPGA). Furthermore, experimental results are conducted for low-power prototyping to examine the satisfactory performance of the proposed control architecture.

中文翻译：

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弱电网和孤岛条件下基于光伏的电压源转换器的内部模型功率同步控制

并网电压源转换器（VSC）的电源同步控制策略提供的操作类似于同步电机。它能够避免由标准锁相环集成到弱电网中引起的不稳定性。但是，已开发的动力学中的非最小相位现象对交流系统的稳定性提出了根本性的限制。本文提出了一种基于内部模型的一自由度控制方法。它引入了一种控制方法，将系统标称模型的动力学纳入控制结构中。它还纠正了右半平面零点的有害影响。该模型的明确合并增强了基于PV的VSC中控制器的跟踪能力。除了，本文表明，单回路控制足以调节有功和无功功率。验证结果是通过基于Xilinx Zynq-7000 SoC现场可编程门阵列（FPGA）的硬件在环系统生成的。此外，进行了低功耗原型设计的实验结果，以检验所提出的控制体系结构的令人满意的性能。